January Lunchtime 2018
Chef and Game with Sequence
February Challenge 2018
Chef And His Characters, Chef And The Patents, Permutation and Palindrome
March Challenge 2018 DIV 2
A Big Sale, Chef and Glove
August Challenge 2018 Division 2
Problem Sort, Sheokand and Number, Spell Bob
September Challenge 2018 Division 2
Magician versus Chef, Bad Shuffle, Chef and Adventures, War of XORs
October Challenge 2018 Division 2
Minimize Digitsum, Chef and Serves, Byte to Bit, Chef and Circles
Code Melange (Rated)
The Deadly Sin, Candy Love
January Challenge 2019 Division 2
Fancy Quotes, Chef and Modulo Game, Distinct Pairs, Different Neighbours, Yet Another Problem About Sequences, Lucky Number Game
February Challenge 2019 Division 2
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Art of Balance, Deputy Chef
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Chef and a Beautiful Digit
August Challenge 2019 Division 2
Football, Zombie and the Caves, Distribute Apples, Dilemma, Guddu and his Mother
January Challenge 2020 Division 2
Chef and Dynamo, Doraemon, Equality, Chefina and Prefix Suffix Sums, Breaking Bricks
June Lunchtime 2020 Division 2
Maximum AND, Chef and Demonetisation, Increasing Decreasing, Gold Mining
India